Numerical study of the effect of NH<sub>3</sub> addition on CH<sub>4</sub>/air combustion characteristics under gas turbine operating conditions

Liu, Dianlin; Zhang, Yanfei; Li, Qin; Huang, Mingming; Liu, Zhenxian; Zhang, Haipeng

doi:10.1039/d3se01330h

Sustainable Energy Fuels

2024

DOI: 10.1039/d3se01330h

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Numerical study of the effect of NH₃ addition on CH₄/air combustion characteristics under gas turbine operating conditions

Dianlin Liu,

Yanfei Zhang,

Qin Li

et al.

Abstract: NH3 has recently gained attention as a carbon neutrality fuel and an energy carrier for H2 or a carbon-free alternative fuel, which has led to renewed interest in studying the...

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Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames

Wang,

Zhang,

Cheng

et al. 2024

Physics of Fluids

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As one of the most promising zero-carbon fuels, ammonia has attracted widespread attention. However, ammonia combustion faces problems such as high nitrogen oxide emissions. This work aims to investigate the combustion characteristics of fuel gas mixture of 60% NH3 and 40% CH4 by volume, under five different equivalence ratios, i.e., 0.7, 0.85, 1.0, 1.15, and 1.3, respectively. Both large eddy simulation (LES) and experimental test are conducted. The results reveal that flame temperature and nitric oxide (NO) emissions exhibit an initial increase, followed by a decrease with rising equivalence ratios. Notably, the highest temperature is observed at ϕ = 1.0, while peak NO emission is found at ϕ = 0.85. As the equivalence ratio changes, the variation of turbulent flow fields and mass recirculation rates is not significant. On the contrary, NO and OH radicals exhibit distinct shifts in relation to the equivalence ratio. The NO emissions predicted by LES agree well with the experimental results. A chemical reaction network (CRN) analysis is also conducted, which effectively predicts NO variation trends and clarifies NO generation pathways and key mechanisms. The CRN analysis highlights variations in the sensitivities of crucial constituents, such as NH3, OH, and NO, to variations in the equivalence ratio.

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Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames

Wang,

Zhang,

Cheng

et al. 2024

Physics of Fluids

View full text Add to dashboard Cite

show abstract

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Numerical study of the effect of NH₃ addition on CH₄/air combustion characteristics under gas turbine operating conditions

Abstract: NH3 has recently gained attention as a carbon neutrality fuel and an energy carrier for H2 or a carbon-free alternative fuel, which has led to renewed interest in studying the...

Cited by 1 publication

References 66 publications

Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames

Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames

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Numerical study of the effect of NH3 addition on CH4/air combustion characteristics under gas turbine operating conditions

Abstract: NH3 has recently gained attention as a carbon neutrality fuel and an energy carrier for H2 or a carbon-free alternative fuel, which has led to renewed interest in studying the...

Cited by 1 publication

References 66 publications

Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames

Large eddy simulations and experimental studies of the influence of equivalence ratio on the combustion characteristics of turbulent NH3–CH4 premixed flames

Contact Info

Product

Resources

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Numerical study of the effect of NH₃ addition on CH₄/air combustion characteristics under gas turbine operating conditions